Sanitary food container and method for opening it



Aug. 19, 1931). H. KARL 1,773,362

- "SANITARY FOOD coN'rAINEN AND METHOD FOR OPENING IT Filed Feb. 3, 1927 Patented Aug, 19,193 a 1,773,362 a r el FEE ETEIIJRICH KARL, or JERSEY our, NEW snnrreay noon conrArnEn Am) mnrrron roit OPENING rr epplication 'filed February 3, 1927. seri No: 185,611. H v i The improvement of this container consist Figures 4, and 6 show parts the pref- V chiefly in the arrangements that permit the 'erable tool for opening the can; and

consumer to ope11tl1e food container by simgu 7 i imp r t Ql With three ply dislodging the cover with a tool without, shanks .(or points) that serves also for quick,

"' 5 however,cuttin or tearing off the metal of ly dislodging the cover. from the container.v 5

the cover, etc, whereby it is prevented that The container consists of the can bodywl metal particles fall into the contents that which, 1n the drawmgs,1s represented as bemaybe eatables; lng made of sheet metal but it may as well Afurth er improvement of this container be made of glass,=porcelain, earthenware,

10 consists also in the construction, form, and e and may have any of the well known 50 resulting co-action of apart of the cover p t may e cylindrical or of cubicform, and a part, ofthe container, and the method of 9V r ct g Shape h maybe Oval, of placing and confining the sealing'm'aterial eta, and thecover that 1s to benlade Of tothese parts and in such manner as to pre- Sheet tal must be shaped accordlngly to 15, Vent particles f hi ali t i l f lit the container or can. The upper end part 6 Y vide the cover with a part made of glass to can afittihg material, and before this isidones falling into the contents of the container" of the CO ner body l is to be bent or while it is being closed and while itremains Shaped tw ly as a 3 0r 3' in a manner closed and whenit is being opened. i t hQfi ,2 etC. )Wlll have a hold Injuries to'the intestinal organs, as for h 11115 bent arohhd thls outwardly h instance the membranes thereof and the P9 ofthecontmner dy as shown in 70 worseconsequences, such as appendicitis or F g r s 1 and 7 A a Sullfiahle part, pref- 1 cancer that may result afterwards, are avoid e y'i d r the outwardly bent 1 1- ed thereby a p tion 3, 1s placed'a cord 4, or rubber str ng An object of the invention is also to pro- Wlre, fibre, -5 WhlCh I 'Wlll enable the consumer to see the contents of the Fh Q Wire fibre is to be d pp container when the other parts thereof are 11149091 pu d through q h sllhshahce, d f an Opaque t i l 7 r or onethat may be HIELdGllqIHd 1n a different Another improvement consists also of a y a 'Whlch y be of a celmlh Char" I.

special tool for quickly dislodging the cover adhere according to the Contents of the C311- 80 from the can'so that it canbe removedithere- If th ln h are contalned in he from I then lt 'is'preferable to use the cord and to The invention is relatively simple comf i i Ph it ws melted f, pared with other inventions of a similar It can be the ,Wlre that 15 i he treated 111 a Character and Consists f th r e simllar manner.- Instead of wax however, 85

liquid rubber with certain ingredients, such as granulated cork, etc., may be used, or the wire may be, heated and pulled through molten soft solder and appliedto the can, a which may bea sheet metal can, and when do the cover is put on that portion must be heated again so that the solder adheres also 7 to the cover. Other substances that may be employed are rosin, gum, cement, putty, sealand parts which are more clearlyset forth in the now following detail descriptionand illustrated by the accompanying drawings,

wherein like reference characters indicate like parts and of which drawings,

Figure 1 is a sectional view of a part of the can supposed to be made of sheet metal with cover put on, of which cover also only a 1???? g l H V H d f th ing wax, stearin, varnish, shellac, paste made 535 I S w 19 me 10 O P e of flour, tar, pitch, etc. The main purpose can wit a specia tOOl, of these blndlng materials is tomake an air 3 Shows a modification of the and watertight seal between the cover 201* method n bendlngthe upper edge of the can 2 and the can 1, 1, respectively, when the or container when 1t is madeof sheet metal, cover is put on. When the eatabl'es, etc. 109

are filled in and the spring 4 etc., is put around the can and placed underneath the outwardly bent portion 3 or 3 the cover 2 or 2 is put on and the outer portion 5 of this cover that had first the shape as shown by the horizontally made dotted lines in Figure 3, may be bent before to an angel of 90 degrees by a suitable shaped part of a machine purposely constructed to perform the function. This outer portion 5 however, of the cover 2 or 2 may be bent downwardly, as seen at 6 in Figure 3, when the cover is already put on. It is important that the downwardly (vertically) directed part 5 of the cover makes a very close contact with the outermost extended portion of the part 3, 3 of the container body for preventing the sealing material (fitting material with coating properties etc.) that is to be placed underneath the part 3, 3 to spread to the upper surface of this part at the closing of the can so that no sealing material willbe near the opening of the container and, consequently, will not fall into the contents of the can when it is being closed or while it remains closed or when it is being opened. After placing the cover in the aforesaid man nor the lower part of part 5 then will be bent against the can body 1 in a manner that at the same time a flange or edge 7 is obtained. It is then immaterial if the edge of the cover 2-, the portion 5 thereof, respectively, is bent upwardly, or if it adheres to the can body 1 in a downwardly bent manner, as shown in the drawings. In any instance, it is important that there is a recess obtained by the inwardly bent portion 8 that serves a purpose that will appear hereafter.

When the cover 2, its portion 5 respectively, is put on in the aforesaid manner, the coated string 4t (etc.) will then be strongly pressed against the outer downward surface of the portion 3 of the can body and the coating of the cord (etc) l adheres then to said portion3and the corresponding surface of part 5 of the cover, thereby hermetically closing the can, whereafter the cooking process can take, place. It is a purpose that no binder be placed between the upper surface of the part 3 or 3 and the corresponding part of part 5 because particles of the binder may fall into the contents of the can at the lifting of the cover after its forcible dislodging that will be explained hereafter. If binders, such as tar, rosin, sealing'wax, beeswax, etc., or a soft solder are used, the part 5 of the cover must be heated afterward so that these binders melt and through that adhere firmly to the metal sheet, etc. that embraces the coated string or wire 4. The heating of part 5 after the cover is put on will not be necessary if said binders are still hot when the part 5 of the cover is pressed against them. For opening'the can it is necessary to employ pincers or one of the tools that are illustrated in Figures 2 or 7, which will be described hereafter. One shank 11 or 11 or two of them of that tool then has to grip around the flange 7 so that its edge reaches as far as possible into the recess underneath the portion 8 and the other shank 11 or 11 is to bear against the top portion 9 that is depressed; preferably it is to bear against the top as at 9 and by pulling them forcibly at the handle 10 or 10 10 the flange 7 will also be pulled outwardly whereby the portion 5 of the cover will be dislodged from the can 1. The string 4 (etc) will be pulled out simultaneously when the portion 3 is formed, as shown in Figures 1 or 2, and the cover can then be removed and no metal particles nor such of the coating or fitting material that seals the can will fall into the eatables.

In Figure 1 the upper end portion of the can body that is supposed to be made of sheet metal is formed so that the edge is turned upward, while'in Figure 3 it is turned downward, but it could as well be rolled up as shown in Figure 2. There are still more possibilities of shaping this portion of the can and if sheet metal is employed, the edge itself can be bent so that the raw cut of the metal is concealed. The metal sheet can be of the strong kind usually employed for preserving cans.

In cases where the can body is made of sheet metal or other material through which the contents cannot be seen and as the consumers, in most cases, would like to see the contents of part thereof, I providea glass portion 12 (see Figure 1) suitably shaped and laid in a cut-out portion of the cover 2 (or 2 etc.) that has the same shape to thereby enable the purchaser of the can to see at least the top portion of the goods. The edge of this cut-out of the cover 2 (or 2 etc.) is preferably made so as to support the glass 12, and more particularly is shaped so that the edge of the glass bears against the metal. I thereforebend the edge portion 13 down ward, then part of that downward-bent portion is to be bent so as to take the horizontal direction such as indicated by 14 in Figure 1, whereafter the lass 12 is put on in a manner as to lay upon the portion 14. .Vith little putty, etc. applied between the part 13 of the metallic portion of the cover and the edge portion of the glass then the cover itself with glass will be also made air anC watertight.

The tool shown in Figures 2, 4;, 5 and 6 preferably consists of two hinged parts of which the handle part 10 with the shanks 11 form one part and the handle part 10 and shank 11 forms the other part. The shank 11 may be a little longer than the shanks 11. This tool can be made cheaply since the metal needs to be only of an inch thick or even less than that, and each of the two parts can be cut with a die. The part shown in Figure 4 then is to be bent at thedotted line 25, then the part shown in Figure 5 put into this folded part and the pin. shown in Figure 6 is pushed through the holes 26, 27, 28 and then the end indicated by 28' is to be broadened in a well known manner through hammerin There are tools known already that serve Ior opening bottles; such tools may be employed also in the present invention (see Figure 7) v whereby the shanks 11, 11 must be of a certain length in respect to one another and in order to permit a quick opening of the can two shanks 11 could be provided for which will grip the flange 7 simultaneously at two points that are distanced by about A of an inch when the tool is placed in position forv I be used if it is of that kind that adheres suiiiciently to the can body before the cover is put on that is to compress it.

Having described a preferable form of my invention, I wish to make it known that minor changes may be possible without, however, departing from the spirit and scope of the invention.

What I claim is:

1. Ina container consisting of the container body and a cover therefor which latter is to be separated from the container body by means of a suitable tool designed for pulling outwardly the edge portion of the cover without tearing in the metal, the upper end portion of the container body being extended outwardly, the cover including a part made of sheet metal and this part adapted to be bent so as to grip underneath the whole outwardly extended portion ofthe container,"a coating material with properties of a binder applied only underneath said outwardly extended portion of the container body before said part of the cover is bent to grip underneath thereof and said part of the cover bent so as to form a lengthwise endless recess and to compress all said coating material in a manner that it adheres to the nearest part, namely, the outer downward facing surface only of said outwardly extended portion, of the container body as well as to that part of the cover that compresses it, thereby forming a hermetic sealing means for the container, said outwardly extended portion of the container and corresponding part of the cover formed in such manner as to coact that none of said fitting and coating material will reach the upper surface of said outwardly extended portion of the container body and consequently also the contents of the container when the container is being closedand-whfle it remains closed and when it is being opened. '2; in a container consisting of the container-[body and covertherefor which latter is to beseparated from the container body ineansjof a suitable tool-desi ned for pull 7 ing outwardly the edge portion of the cover without tearing inthe metal, the upper end portion ofthe container body extended-outwardly in such proportion as to permit the I placing of; fitting and bindingmaterial underneath thereof without letting t come into contact with theedge of the opening of the can, thecover includinga part made of sheet metal andthis'part adapted to be bent so -as;; to grip underneath the whole outwardly ex-.

tended portionof the container, said fitting material beingcoated with a binder laid only underneath said outwardlyextended portion of the container body before said part of the cover is bent to grip underneath thereof, and said part of the cover bent soas to' form'also a lengthwise endless recess and to compress all'said coated fitting inaterialtin a manner that the coating thereof adheres to the nearest part, naiiiely,the outer-downward'facing surface only of saidoutwardly extended'portion, of the container body as well as to that part of the cover that coinpresses said fitting material, said outwardly extended portion of the container and corresponding part of the cover formed in such manner as to coact that none of said fitting material and binder will. reach the edge of the opening of the container nor the upper surface of said outwardly ex-;

tended portion of the container body and con-- sequently the contents of the container when the container is being closed and while it remains closed and when it is being opened.

3. In a container consisting of the con tainer body and cover therefor which latter is to be separated from the container body by means of a suitable tool designed for pull ing outwardly the edgepart of the cover without tearing in the metal, the upper end portion of the container body being extended outwardly, the cover including a part made of sheet metal and a part made of glass, part of the coverthat is made of sheet metal adapted to be bent so as to grip underneath the whole wardly extended portion of the container body and of that part of the cover that compresses it, said outwardly extended portion of the container and corresponding part of the cover formed in'such manner as to coact that none of said fitting material will reach the upper surface of said outwardly extended portion of the container body and consequently the contents of the container when the container is being closed and while it remains closed and when it is being opened.

4. In a container consisting of the container body having an outwardly extending portion on its upper edge and a cover of which a part must be made of sheet metal, said part of sheet metal adapted to be bent underneath the whole outwardly extending upper edge of the container body, and a binding material that must be melted by heat applied only underneath said outwardly extending por tion of the container before said part of sheet metal of the cover is bent and that part of sheet metal of the cover covering all of said binding material and compressing it so that it adheres to the outer downward facing surface of said outwardly extending portion of the container and heated afterwards to melt said binding material to make it adhere well to that part of sheet metal of the cover as well as to that outwardly extending portion of the container without adhering to the upper surface hereof.

' HEINRICH KARL. 

